Bishnoi et al reported the Lichen Planus Activity Area and Severity Index (LPAASI) for evaluating a patient with lichen planus. The index has several subscores, one of which is for cutaneous area and severity. The authors are from the Post Graduate Institute of Medical Education and Research in Chandigarh, India.
Patient selection: lichen planus
Parameters:
(1) body region, as decimal fraction of total body surface area
(2) percent of surface area in body region showing a skin change, as a number from 0 to 100
(3) skin changes
Body Region
Factor
face and neck
0.1
upper limbs
0.2
trunk and genitalia
0.3
lower limbs with buttocks
0.4
Skin Change
Points
postinflammatory hyper- or hypopigmentation
1
papules/follicular lesions
2
plaques, hypertrophic or atrophic lesions
3
bullous lesions, erosive/ulcerative lesions
4
scarring
5
total score =
= SUM((body region factor)*(percent of area in region involved) * (points for skin change))
Interpretation:
• minimum score: 0
• maximum score: 750
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